Circuit breaker



y 3, 1 929. J. M. ANDERSQEN 1,721,584

CIRCUIT BREAKER Filed Jan. 24, 192"! 5 Sheets-Sheet 1 ly 23, 1929- w J.M. ANDERSEN 1,721,584

CIRCUIT BREAKER Filed Jan. 24, 192'! 5 Sheets-Sheet 2' Ira/ am I J y 19r 'J. ANDERSEN: 1,721,534

CIRCUIT BREAKER Filed Jan. 24, 19 27 5 Sheets-Sheet 5 July 23, 1929. .1.M. ANDERSEN 1,721,534

CIRCUIT BREAKER Fi led Jan. 24, 1927 5 Sheets-Sheet 4 July 23, 1929.

J. M. ANDERSEN CIRCUIT BREAKER 5 Sheets-Sheet Filed Jan. 24, 1927 fig.10

127' a l a. f L #500 V Patented July 23, 1929.

UNITED STATES v I 1,721,5 4, PATENT OFFICE.

JOHAN ANDEBSEN, OI BROOKLINE, MASSACHUSETTS, ASSIGNOR TO ALBERT & J M.

ANDERSON MANUFACTURING COMPANY, OF BOSTON, MASSACHUSETTS, A GORPO-RATION or massnonusn'r'rs.

CIRCUIT BREAKER.

Application altern tes- 24, 1927. Serial No. 163,021.

This invention relates to a circuit controller and is herein shown asembodied in an electric circuit controller of the character known as acircuit breaker.

The invention has for its object to rovide a circuit controller in whichthe mova le member thereof is locked in both its opened and its closedpositions and is released or unlocked therefrom under conditions of use,as will be 1 described. I Y i The invention further has for its objectto provide a circuit controller of the, character described which isthermostatically operated, as will be described.

The'invention also has for its object to provide foropening thecircuitbreaker Sub. stantially as soon as closed under certainconditions of use, as will be described.

The invention also has for its object to provide a circuit breaker whichmay be included inthe secondary circuit of a transformer and beresponsive to current conditions of the secondary circuit of anothertransformer.

The invention further has for its object to provide a circuit breaker inwhich pressure is employed to close the breaker, and is accumulatedwhile the breaker is locked in its open position.

These and other features of the invention will be'pointed out in theclaims at the end of this specification. I

Fig. 1 represents in side elevation a circuit breaker embodying thisinvention, the breakcr'being shown inits open position;

Fig. 2, a view like Fig. 1 with the breaker in its closed position; a

'Fig. 3,; an opposite-side elevation with the breaker in its closedposition;

Fig; 4, a detailshowing the breaker open with its operating lever in,its raised position;

Fig. 5,.a plan of theoperating lever shown in Figs. 1 and 4;

Fig. 6, a plan, and

for the operating lever; F igr.8,a detail of the heater switch and itsbperating mechanism; a Fig. 9,'a section of the thermostatic device 5and its heater shown in Fig. 1, and

Figs. 10 and 11, diagrammatic views to 'illustraiethe working of theinvention.

Referring to the drawings 10 represents -.two toggles, one of whichconsists of the levers Fig. 7 a side elevation, of the locking leverthemovable contact member,- and 12, the'stationary'contact members of acircuit breaker or controller embodying this invention.v 4

The movable contact member 10 is secured to a movable carrier, shown asa lever 18 pivoted at'14 to a suitable supportin frame, which may be ofany desired or stan ard construction, and comprises a metal frame 22attached to a panel or slab 23 of insulating ma: terial. Provision ismade for automatically movmg the contact member 10 into its closedposition in contact with the stationary contact members 12, which iseffectedby-a thermostatically operated device, herein shown as arelatively strong helical spring loco-operating with a metallic bellows16 containing --ethylchloride or like medium capable of being expandedat a relatively low temperature.

The metallic bellows 16 has fast ,to its up-.

per head a guide rod 17 on which is. mounted a seat member 18 for thelower end of the spring 15 and a cap member 19 for the upper endthereof.

, The cap member 19 is loose on the guide .rod 17 and has co-operatingwith it a lever 20, pivoted at 21 to the framework 22 and forming partof the operating mechanism {)or tie movable circuit controlling mem- Theoperating mechanism also comprises 24, 25 connected with the carrierlever 13 and the framework 22, and the other toggle con- 'sisting oflevers 26, 27, the lever 26 bein connected" with the center pin 28 ofthe toggle y 24, 2.5, and the lever 27 being connected the pin 29 withthe lever 20.

The. toggle 26,- 27 may be designated a toggle link, and provision ismade so that under one condition of use, as will be described, it willact as a rigid link for connecting the. lever 20 with the toggle 24, 25,and under another condition of use, it will function as a toggle topermit the breaker to open.

To these ends the lever 27 is provided at one end w'itha finger 30,which'is held against a lug or stop 31 on the lever 26 by a spring 32having its center portion engaging the center pin 33 of the toggle 26,27, and having one end engaging the center pin 28 of the toggle 24, 25and the other end engaging the pin 29 on the lever 20. i

the toggle 24, into its closed or straightened position, shown-in Fig.2, and this is effected by movement of the lever 20, with the toggle 26,27 acting as a rigid link.

In accordance with this invention, the cir cuit -breaker is normallyopen, as shown'in Fig. 1, and is locked or retained in this posi-' tionby a latching or locking lever or arm 35 fast on a rockshaft-36'andprovided with a I latch .37, which is en aged with a cross bar.

0f the ever 20, wh1ch latter is shown separately in Fig, 5,

The lever 20is rovided on its under side with a nub or pro ection 39,whichbears on the cap member 19, as shown in Fig. 1, and is held inengagement therewith, by a" spring 40. Y

The latching lever 35 is designed to be automatically disengaged fromthe lever 20 by the thermostatic device, and for this purpose therockshaft 36 is provided with an arm 41 whose free end co-operates withthe seat member 18 for the spring 15. l t

The metallic bellows 16 is expanded in response to a rise intemperature, as will be described, and the seat member 18 graduallycompresses the spring 15 against the lever 20 until the latter isreleased by the latching.

lever 35, whose latch 37 is disengagedfrom the cross bar 38 by themetallic bellows 16 I lifting the arm 41 and rocking the'shaft 36.

. as will be described. a

The lever 20 is unlatched or released when the metallic bellows has beenexpanded a predetermined amount under a condition of use,

The cap member-19 has co-operating" with it a nut 190 screwed upon theguide rod 17,

and by means of said nut, th'einitialtension on .the spring 15 may bedetermined, and

thereby determine the length of time the ther-"- mostat 16 must'beheated before the lever 20 will be unlatched and released. While themetallic bellows-is being expanded, the spring 15 is being compressedagainst the locked operating lever 20, and energy is stored up in said.spring, so that when the latch 37 is disengaged from the lever 20, thefree end of the latter is elevated by the spring 15, and'the toggle 26,27 acting as a rigid link straightens orcloses the toggle 24, 25 andmoves the lever 13 to close the breaker, as represented in Figs 2 and 3.

The thermostatic device 16 is rendered ac tive by a thermal unit, showni i-section in a F ig. 9, and consisting as herein shown of a coil 45,of wire wound on an insulator 46 andloeated within the thermostat ormetallic bellows-16.

- When thethermal unit produces s uflicient Y heat to' expand thethermostat 1-6 the proper amount, the breaker. is closed as abovedescribed.

The thermal unit may be supplied with current from any suitable sourceof current and particularly from the secondary circuit of a transformer,whose rimary is included m the main lin'eof an alternating currentsystem, as will be described. i

- Provision 'is made for. locking the breaker in its closed positionunlocking the same. g

The breaker is locked in its closed position, shown in Fi 2, by means ofa lever 50 having its lower end pivoted at 51 to a tripping coil orelectromagnet 52 and having its upper end arranged to be moved. underand be engaged withthe free end of the lever 20.

The upper end of the locking lever 50 preferably carries a roller 53 forengaging the lever20. p

The tripping coil 52 is mounted on the frame 22 in proper position tohave the locking lever 50 function properly to lock the operating lever20 in its elevated or-operative position and'jto unlock the same.

The locking lever 50 is connected with the and for automatically core 54of the tripping coil 52 by a toggle comprising the levers 55, 56 havingtheir cen-.

ter pin 57 extended into'a slot 58 in the head 59 of a rod60 to whichthe core 54 is fastened. I 1

l The lever 55 is connected with the locking lever 50, and the lever 56is fast on a rockshaft 61 mounted on the magnet 52.

In the present instance, the toggle 55, 56

is closed or straightened by the weight of the core 54, and is brokenwhen the tripping coil 52 is energized. v

The locking lever 50 normally bears against the end face63 of the lever20, when the latter is in its lowered position and the breaker is open,as shown in Fig. 1, and under these con 'ditions, the locking lever 50is held by the lever 20 from movement under the influence of gravity.

When however, the lever 20 is elevated into its operative position,gravity acting on the core 54 straightens the toggle 55,- .56 and movesthe lever 50 under the lever 20"and locks the .latter in its elevatedlocking lever 56 is move from under the lever20 and into its inoperativeposition.

The movement of the locking lever 50 into itsinoperative position maybeeffected automatically or manually.

osition, until the The automatic action is efi'ected by when I gizingthe tripping coil or magnet 52, which moves its armature or core 54upwardly from the position shown in Fig. 2 into that shown in Fig. .1,causing the head 59 to break the toggle55, '56 and thereby move thelocking lever 50 from under the lever 20.

The manual action is obtained by means of a hand-operated lever 65pivoted at 66- to theframe'22 andhaving its short arm 67 provided with alug or projection 68, which cooperates with a crank or arm 69 on therockshaft 61 to which the toggle lever 56 is fastened to move therewith.

with a suitable handle (not shown) and the handle of said lever isnormally held elevated by a spring 70, which holds a second lug .or-

projection 71 on the short arm 67 of the lever 65 against a yieldingback stop or plunger 7 2, movable in a suitable housing 73 on the frame22 and normally pressed forward by a spring 74.

The spring 74 is capable of being compressed by the operator moving thelever 65 upwardly beyond its normal position in the direction indicatedby the arrow 75 in Fig. 2, and to such extent as to engage the'lug 68with the crank or arm 69 and rock the shaft 61 so as to break the toggle55, 56, and thereby manually move the locking lever into its inoperativeposition, shown in Fig; 1, which permits the spring40 to move the lever20 downward and through the toggle link 26,- 27 break the toggle 24,25and open the break- .er, providing that the thermostat 16 is cool so asto permit the lever 20 to be so moved.

When the operating lever 20 is lowered by its spring 40 into itsstarting position, shown in Fig. 1, it is locked or latched inthisposition by the lever 35, which is movedby a spring 80 so as toengage the latch 37 with the cross bar 38 on the lever 20, as shown inFig. 1. 1 1

The spring 80 is anchored at one end and connected with a crank or arm180 on the rockshaft 36.

Provision is also made for automatically opening the breaker with theactuating lever 20 in its elevated position, and held in such positionby'the thermostatic device 16, if the latter has not had opportunity tocool sufliciently to allow the lever 20 to be lowered by its sprin 40,but is held elevated by the spring 15 and- ,e ex an'dedmetallic bellows16.

To this en ,.the head 59 of the core of the tripping coil52, isconnected by a link 81 with an "elbow lever 82pivotally mounted on theframe 22 and having its long arm 83 arranged with relation to the togglelink 26, 27 50 as to strike the link 27, and break the toggle link, asrepresented in Fig. 4, when the tripping coil 52 is energized, thusallowing the breaker to open with the lever 20 in its elevated position.I

After thebreaker has been opened and the thermostatic device has cooled,the lever 20 is moved by the spring 40 into its lowered "or startingposition, and at such time, the

spring 32 strai-ghtens the'toggle 26, 27 and brings itjnto its normalfunctions as a rlgld l nk. a

Provision is lnade for manually unlockposition, wherein it stop, asrepresented in Fig. 1. v

Under these conditions, the breaker may,

- To this end, the rockshaft 36 to which the latching lever 35 is fast,is provided with a crank or arm 90, which is connected by a Thehand-operated lever is provided rt link 91 with a bell crank lever 92mounted on the pivot pin 51 carried by the tripping coil 52, said bellcrank having an arm 93 of sufiic-ient. length to have its upper end inthe path of movement of: the short arm 67 of the hand-operated lever 65,with the latter in its normal or elevated position, in

which the lu '71 carried by'the lever 65 engages the p unger 72 of theyielding back be manually closed, for on the initial downward. movementof the hand-operated lever 65, the short arm 67 thereof acts on the arm93'of the bell crank 92 and turns the latter so asto move the link 91 inthe direction indicated by the arrow 95 and thereby rock by the lever50,-

It'will'thus be seen that; when the breaker is open and the thermostat16 is cold, as represented in Fig. 1, the'breaker is locked initsopenjposition by the latching lever 35- engagingthe lever 20.

It will also be seen that the breaker may be automatically unlocked andvthen closed by the thermostatic device, and may be manuv2, in whichposition the lever 20 is ,locked ally unlatched and then closed by thehand- I operated lever 65.

'"' It will further be seen that when the breaker is. closed, thebreaker is locked in its closed position by the locking lever 50, andmaybe automaticall unlocked by energizing the tripping coi 52, and if V thethermostat is sufficiently cooled, the breaker may. then be opened bythev spring 40 moving the lever 20 downward so as to break the toggle24, 25.

Under the same thermostatic conditions, the breaker may be manuallyunlocked by moving the hand-.operatedlever 65 upward 'ly beyonditsnormal elevated position so as to cause the toggle 55, 56 to be brokenand the locking lever 50 to,be'moved1from under the lever20. i i

It will also be seen that the breakermay be automatically openedsubstantially as soon as it has been closed and with the lever 20 heldelevated by the thermostat 16 in a heated condition, which is effectedby energizing the tripping coil 52 andbreakingthe toggle link 26, 27 bythe bell cran'k83, 82, and that this I result may be manually effectedby the handprevents the locking lever 50interfering with operated leverin its elevated position. v

The tripping coil 52 may be constructed to respond to the closing of aswitch, or to respond to an abnormal current condition in the circuit,such, for instance, as anoverload or a reverse current. Thetripping coil52 may be controlled by a switch operatively connected with the mov ablemember of the breaker, which switch is conventionally represented inFig. 3as comprising a movable blade or member 190 and stationary contactmembers 191.

It will thus be seen that the circuit of the tripping coil 52 is open atthe switch 190, 191 when the breaker is open and is closed at the switch190,191 when'the breaker'is closed.

The heater coil 45 is controlled by a switch comprising stationarycontacts '193 and a movable blade or member 94 (see Figs. 3 and8).

The movable blade 94 is 'operatively connected with the lever 20 byalink 195, pivoted to the lever 20 and having a slot 96 into which isextended a pin 97 on the movable member 94, which is pivoted at 98 to ia stationary arm or bracket 99.

The pin 97 has co-operating with it a hooked finger 100 attached to thearm 41:

of the latching-lever 35 The finger 100- extends over the pin 97 andserves to move the switch member 94 into engagement with the stationarycontacts 193 and thus close theheater switch when the latching lever. 35is moved into its operative position.

It will thus be seen that when the then mostatically operated lever 20is latched or locked in its lowered position with the breaker open, asshown in Fig. 1, the switch member 94 ofthe heater switch is in itsclosed position, and cannot be opened until the lever 20 is unlockedwhereupon it is opened at 01*" about the time the breaker is closed,which opening of the switch is effected by the lever 20 through the link195. I

The slot 96 in the link 195 permits the' switch member 94 to'remainuna'cted upon for the greater part of the movement of thebreaker-operating lever 20, which enables the downward movement of thelever 20 until.

the latching lever 35 is free to be engaged with the cross bar 38to-lock the lever 20 in with a tail piece 101, which co-operates withits lowered position. I

The lever 27 of the toggle link is provided the locking lever 50 so asto move the said lever out of the path of the lever 20, when the breakeris opened by the tripping coil with, the lever 20 in its elevatedposition, and

from this secondary may be trace the descentpf the lever 20. v

The tail piece 101 becomes effective on the locking lever 50 when thetoggle link 26,27 is broken.

A circuit controller or breaker of the character described is especiallyadapted among other uses to be employed in alternating current systems,and particularly for controlling the secondaries of a plurality oftransformers, which secondaries it is desired to cut in or cut out ofthe system to meet the requirements of use.

Figs. 10, and 11 diagrammatically represent an alternating currentsystem whose main lines 110, 112 have connected-with them the primarywindings 113, 114 of two transformers 115, 116.

The secondary circuit'117, 118 of the transformer 115 is represented inFig. 10 as in 45 is in a circuit tapped off from'the secondary circuit117, 118 of the transformer 115.

, The circuit of the heater'coil 45 may be traced as follows: from'theline 117 by wire 125 to the heater coil 45, thence by switch 193, 94 andwire 126 to the other line 118 of the secondary circuit of thetransformer 115.

This circuit, is provided with a switch 127, which may be manually orautomatically operated. It is represented as manually operated.

It will thus be seen thati'when the switch 127 is closed, the.circuitof' the heater coil 45is closed.

The tripping coil 52 is also supplied with current from the secondaryor.secondaries connected in theservice line, and as represented in Fig.10, the secondary 117-118 is in service, and the circuit of the trip ingcoil lows: from the wire 117'by wires 125, 130, coil 52, wire 131,switch 190, 191 and wire 132 to wire 118.

. This circuit is normally openat the switch 190, 191, as shown in Fig.10 and is closed as folat the said switch when the breaker member 10 isclosed as represented in Fig. 11, and the tripping coil in such caseremains inactive until operated by an overload or a reverse currentcondition. On the other hand, if the tripping coil is a straight magnet,its circuit is provided with a switch 200, which may be manually orautomatically operated- In Figs. 10 and 11 the service line from 1 whichcurrent is supplied to the customers is I stationar tact mem er, athermostatlc devlce forefi'ecb as represented in Fig. 10.

ping coil is closed, so that the latter will'auto-- maticallyircsponseto the abnormal current condition to which the tripping coil isconstructed to respond.

, An desired number of transformers may thus e successively cut into andcut out of serviceyand in Figs. 10 and 11, the heater coil 45ofa'breaker for an additional transformer (not shown) is represented asconnect ed with the secondary circuit '120, 121 of the transformer 116.

The circuit of the thermal unit or electric heater .45 is represented inFigs. 10 and Has controlled by a manually operated switch 127, but inpractice the switch 127 may be closed b a synchronizing relay of knownconstruct1on and not herein shown, which operates to close the switch127 when the frequency of the alternating current inthe primary of thetransformer 116 is synchronous with the current in the secondary circuitof the trans-' former in service, which in-the stance is the transformer115.

present in- The opening movement of the contact member 10 is limltedbya. back stop" 150 on the frame22, with which the toggle lever 25cooperates, as shown in Fig. 1.

One embodiment of the invention is here-, in shown, but it isnot desiredto limitthe vention to the particular construction illustrated, I

What is claimed is:

1.- In a circuit controller, in combination a contact member, a movableconing movement of said movable contact member from its open position,means for lockmg said movable contact member in its open positionagainst movement by said thermostatic device, means actuated by saidthermostatic device when heated for unlockihg said movable contactmember, and manually operated means for unlocking said movable contactmember independently of said thermostatic device. p

- 2. In a circuit controller, in comblnatlon a stationary contactmember, a movable contact member, a lever operatively connected.

with said movable contact member, a latching lever co-operatingwith saldoperatlng lever, a thermostatic devicefor effecting movement with saidlatching lever to be closed when sa1d operating lever is latched andsaid movable contact member is in its open position.

3. In a circuit controller, in combination a stationary contact member,a movable contact member, a thermostatic device for effect: ing movementof said movable contact into its closed position, and means for movingsaid movable contact member into its open posideviceand with saidthermostatic device in its heated operative condition.

lever for 'movingsaid contact member into its closed osition, a.springto normally elevate said ever, a yielding stop coopeigating withsaid leverto position it in its 11 rmal elevated position, a device forlocking said .contact-member in its closed'position, and

means co-operating with said locking device and with said lever to beactuated by move-- ment of the lever beyond its normal elevated positionand efi'ect unlocking of said movable contact member inits closedposition.

5. In a circuit controller, m'combination' a stationary contact member,a movable contact member, a toggle lever connected with ofsaid contactmember, an electric heater for v said thermostatic device, and a circuitcontroller for said heater operatively connected tion independently ofsaid thermostaticsaid movable contact member, an-opera'ting lever, atoggle link connecting-said toggle lever with said operating. lever,a-spring to move said operating lever and effect closing movement ofsaid movable contact member,

a lever for locking said operating lever in its inoperative position, athermostatic device co-operating with said spring to compress the sameand ;with said locking lever to release the operating lever-and permitsaid spring to move the operating lever and said movable contact:nemberwhen said springhas been compressed to a predetermined point bysaid thermostatic device.

6.. In acircuit controller, 1n combination a stationary contact member,a movable contact member, a toggle lever connected with saidmovablecontact member, an'operating lever, a toggle link connecting said togglelever with said operating lever, a spring to move said operating leverand effect closing movement 0 inoperative pos1tion,'a thermostaticdevice co-operating with said spring to compress the same and with saidlocking'lever to release theoperating lever and, permit said spring tomove the operating lever and said 'movable contact member when saidspring has been compressed to a predetermined,point by said thermostaticdevice,-a locking device co-operating with said operating lever tomaintain it in its operative position, and a tripping coil operativelyconnected with said said movable contact member, a lever forlocking saidoperating lever in its so 4. In a circuit controller, in combination, amovable contact member, a hand-operated locking device to release saidoperating le'ver; against said mechanical means and to release 7. In acircuit controller, in combination a stationary contact member, amovable contact member, a toggle lever connected with said movablecontact member, an operat ng lever, a toggle linkconnecting said togglelever with said operating lever, a spring to move said operating leverand effect closing movement of said movable contact member, a lever forlocking said operating lever in its inoperative position, a thermostaticdevice co-operating with said spring to compress the sameand with saidlocking lever to release the operating lever and-permit said spring tomove the operating lever and said movable contact member when saidspring has been compressed to a predetermined point by said thermostaticdevice, a locking device. co-operating with said operating .lever tomaintain it in its operative position, and a hand-oper ated leverco-operating' with said locking device to release said operating lever.

8. In a circuit'controller, in combination a stationary contact member,a movable contact member, a toggle lever connected with said'movablecontactmember, an operating lever, a toggle link connecting said togglevlever with said operating lever, a spring to move saidoperating leverand eiiect'closing movement of'said movable contact member, a lever forlocking said operating lever in its inoperative position, a thermostaticdevice -co-operating with said springto compress the same and with saidlocking lever to release the operating lever and permit said spring tomove the operating lever and said movable contact member when saidspring has been compressed to. apredetermined point by said thermostaticdevice, a tripping coil, and a device operated by said tripping coil andco-operating with saidtog le link 'to break the same and permit saidmovable contact member to be moved into-its open position with theoperating lever in its operativeposition.

9. In a circuit controller, in combination a stationary contact member,a movable contact member, a toggle connected with said movable contactmember, an operating lever, a toggle link connecting said toggle leverwith said operating lever, a lever fo'r'lo'cking said operating leverin-its inoperative position, and a hand-operated lever co-operating withsaid locking lever to release said operating lever and permit it'to bemoved into its operative position. v

10. Ina circuit controller, in combination a stationary contact member,a movable contact member, mechanical means for moving said contactmember, a coiled 5 ring for movingsaid mechanical means, a ocklng devicefor said mechanical means and apressure creatlng thermostat-1c, deviceco-operatmg with sa d mechanical-means ando rating whenheated tocompress said coile spring said locking device and permit the compressedspring to expand and move said mechanical means to effect closingmovement of said movable contacting member.

11. In a circuit controller,in combination, a stationary contact member,a movable contact member, a lever connected with said movable contactmember, means for locking said lever with the movable contact member inits open po sition,-a compressible member cooperating with said lever, athermostatic device co-operating with said compressible member tocompress the latter against the said lever when the said lever'islocked, and so. co-operating with the locking means to unlock the saidlever and permit it to be moved by expansion of the compressible member,when the latter has been compressed to'a predetermined point.

- 12. In a circuit controller, in combination, a stationary contactmember, a movable contact member, a thermostatic device, .mechanismoperatively connecting said thermostat ic'device with said movablecontact member to efiect movement of the said contact meme. her into itsclosed position by said thermostatic device when the latter is heated,said mechanism being constructed to" permit movement of said movablecontact member into its open position independently of said thermostaticdevice, and means co-operating with said mechanism to move it into aposition wherein thesaid' movable contact mem her is capable of beingmovedinto its open 'position'independently of said thermostatic deviceand While the latter is in its heated 'operat've condition;

13. n a circuit controller, in combination,

a stationary contact member, a movable'contact member, a coiled springto move said movable contact member into its closed position,'means forlocking said movable contact member in its open position, means forunlocking said movable contact memher, and a thermostatic deviceco-operating with said coiled spring and acting when heated to compressthe-same and co operating with said unlocking means for releasing saidcoiled spring and permitting the latter to expand and move said movablecontact member into contact with said stationary member.

-14.='In a circuit controller, in combination, amovable contact member,a compressible'dev1ce, means for operatively connectingsaidc-ompressible device with said contact member, a thermostatic devicehaving a member expansible by heat co-operating with said com pressiblemember to compress the same, an electric heater for said expansiblemember, and a circuit controller for said electric heater operativelyconnected with said compresslble member to be opened thereby when saidcontact member is closed.

15. In a circuit controller, in combination, a stationary contactmember, a movable con tact member, a lever connected with said movablecontact member, means for locking said lever with the movable contactmember in its open position, a compressible member cooperating with saidlever, a device co-operating with said compressible member to compressthe latter against the said lever when the said lever is locked, andco-operating with the locking means to unlock the said lever and permitit to be moved by expansion of the compressible member when the latterhas been compressed to a predetermined point.

16. In a circuit controller, in combination, co-operating contactmembers, one of which is movable, compressible means for moving,

said movable contact member into its closed position,- and means forautomatically com pressing said compressible means and for actuatingsaid locking means to release said movable contact member after saidcompressible means has been compressed'a predetermined amount and permitsaid compressible means to actuate said mechanical means and move saidmovable contact-,member into its closed position. p

In testimony whereof, I have signed my name to this specification.

JOHAN M. ANDERSEN.

